IOS研究之网络编程(二)-Cocoa Streams使用具体解释-优快云博客

本文详细介绍了iOS网络编程中CocoaStreams的核心类及接口，包括NSStream、NSInputStream和NSOutputStream，并提供了实例代码说明如何使用这些类进行网络通信。

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本文以及相关的系列文章是我总结的iOS网络开发方面的知识点，本文是第二篇，主要分析了Cocoa Streams中的几个重要类

Cocoa Streams实际上是Objective-C对CFNetwork的简单封装，主要包括了三个类:NSStream, NSInputStream, and NSOutputStream。本部分的接口接口比較简单，使用方法一目了然。

我在这里就仅仅列出接口，方便查阅。

对CFNnework不明确的看IOS研究之网络编程(一)-CFNetwork使用具体解释
NSStream接口例如以下:

@interface NSStream : NSObject - (void)open; - (void)close; - (id <NSStreamDelegate>)delegate; - (void)setDelegate:(id <NSStreamDelegate>)delegate; // By default, a stream is its own delegate, and subclassers of NSInputStream and NSOutputStream must maintain this contract. [someStream setDelegate:nil] must restore this behavior. As usual, delegates are not retained. - (id)propertyForKey:(NSString *)key; - (BOOL)setProperty:(id)property forKey:(NSString *)key; - (void)scheduleInRunLoop:(NSRunLoop *)aRunLoop forMode:(NSString *)mode; - (void)removeFromRunLoop:(NSRunLoop *)aRunLoop forMode:(NSString *)mode; - (NSStreamStatus)streamStatus; - (NSError *)streamError; @end @protocol NSStreamDelegate <NSObject> @optional - (void)stream:(NSStream *)aStream handleEvent:(NSStreamEvent)eventCode; @end #if (TARGET_OS_MAC && !(TARGET_OS_EMBEDDED || TARGET_OS_IPHONE))//不能在ios上使用 @interface NSStream (NSSocketStreamCreationExtensions) + (void)getStreamsToHost:(NSHost *)host port:(NSInteger)port inputStream:(NSInputStream **)inputStream outputStream:(NSOutputStream **)outputStream; @end #endif

@ interface NSStream : NSObject

- ( void ) open ;

- ( void ) close ;

- ( id < NSStreamDelegate > ) delegate ;

- ( void ) setDelegate : ( id < NSStreamDelegate > ) delegate ;

// By default, a stream is its own delegate, and subclassers of NSInputStream and NSOutputStream must maintain this contract. [someStream setDelegate:nil] must restore this behavior. As usual, delegates are not retained.

- ( id ) propertyForKey : ( NSString * ) key ;

- ( BOOL ) setProperty : ( id ) property forKey : ( NSString * ) key ;

- ( void ) scheduleInRunLoop : ( NSRunLoop * ) aRunLoop forMode : ( NSString * ) mode ;

- ( void ) removeFromRunLoop : ( NSRunLoop * ) aRunLoop forMode : ( NSString * ) mode ;

- ( NSStreamStatus ) streamStatus ;

- ( NSError * ) streamError ;

@ end

@ protocol NSStreamDelegate < NSObject >

@ optional

- ( void ) stream : ( NSStream * ) aStream handleEvent : ( NSStreamEvent ) eventCode ;

@ end

#if (TARGET_OS_MAC && !(TARGET_OS_EMBEDDED || TARGET_OS_IPHONE))//不能在ios上使用

@ interface NSStream ( NSSocketStreamCreationExtensions )

+ ( void ) getStreamsToHost : ( NSHost * ) host port : ( NSInteger ) port inputStream : ( NSInputStream * * ) inputStream outputStream : ( NSOutputStream * * ) outputStream ;

@ end

#endif

NSInputStream和NSOutputStream都是继承NSStream，接口例如以下

@interface NSInputStream : NSStream - (NSInteger)read:(uint8_t *)buffer maxLength:(NSUInteger)len; - (BOOL)getBuffer:(uint8_t **)buffer length:(NSUInteger *)len; - (BOOL)hasBytesAvailable; @end @interface NSOutputStream : NSStream - (NSInteger)write:(const uint8_t *)buffer maxLength:(NSUInteger)len; - (BOOL)hasSpaceAvailable; @end